The Trulli houses of Alberobello in the Puglia region of Italy were built by settlers from limestone and not much else. An impressive dry stone building technique meant the houses could be collapsed simply by pulling out a keystone.
Viking painting Viking berserks are described as terrible in the Icelandic old Sagas. They are supposed to have trembled, clapping their teeth and howling. When attacking they would bite their shields (Beauty Women Hot)